Compound Information 
Property Availability 
About WTT 
NIST Chemistry WebBook
 
 
 
 
Help
 
 
 
 
 
Previous
Up
Contents
Next
Pop-out

Retrieving content...

Please be patient while help content is retrieved from the server.
Previous
Up
Contents
Next
Pop-out
 
 
 
 
 
 
 
 
Property Availability 
 
 
 
 
 

For this compound, WTT contains critically evaluated recommendations for:
(Please note that if more than 50 points are used for regression, only the 50 most-constraining points are reported)

  • Triple point temperature (Crystal 1, Liquid, and Gas)
    11 experimental data points
    • Critical temperature (Liquid and Gas)
      • Critical density (Liquid and Gas)
        • Density (Liquid in equilibrium with Gas) as a function of Temperature
          Temperature from 423.134 K to 808 K
          5 experimental data points
          • Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas)
            2 experimental data points
            • Heat capacity at saturation pressure
              • Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
                Temperature from 0.0003 K to 349.98 K
                50 experimental data points
              • Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature
                Temperature from 404.42 K to 790 K
            • Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
              Temperature from 200 K to 1000 K
              • Enthalpy
                • Enthalpy (Crystal 1 in equilibrium with Gas) as a function of Temperature
                  Temperature from 0.0003 K to 349.98 K
                  36 experimental data points
                • Enthalpy (Ideal Gas) as a function of Temperature
                  Temperature from 200 K to 1000 K
              • Entropy (Crystal 1 in equilibrium with Gas) as a function of Temperature
                Temperature from 0.0003 K to 349.98 K
                2 experimental data points
                • Enthalpy of formation (Crystal)
                  2 experimental data points
                   
                   
                   
                   
                   
                   
                   
                   
                  Compound Information 
                   
                   
                   
                   
                   
                  Name: 1,2-benzenedicarboxylic acid, anhydride
                  Formula: C8H4O3
                  Molar Mass: 148.117
                  Additional Names: phthalic anhydride
                  1,3-phthalandione
                  phthalandione
                  phthalanhydride
                  o-phthalic acid anhydride
                  1,3-isobenzofurandione
                  1,2-benzenedicarboxylic anhydride
                  Image of 1,2-benzenedicarboxylic acid, anhydride